S.C. Code Ann. § 13-11-50

For the purposes of carrying out its powers and duties, the Authority shall have jurisdiction in accordance with the provisions of this chapter within the boundaries of that watershed in Fairfield County which is drained by the Little Wateree Creek and its tributaries. In addition, it may acquire, by gift or negotiated purchase, real property anywhere within the State for the expressed purpose of exchanging such real property for other real property within the area of its jurisdiction as defined above.